You may use videos posted on YouTube and other video sharing sites which are posted by the copyright holder or with the copyright holders permission.
Many of these types of sites contain content not uploaded by the copyright owner. It is good professional practice to check the legitimacy of a YouTube video before using it in the classroom.
Many content creators like the CBC have channels on YouTube. The videos found on these channels can be used.
Here are some examples of what you can not do in the classroom:
With COVID-19 has come further development of third party streaming plugin apps for individuals to "host" online viewing sessions with friends and family, at this time there are two apps that we can recommend for synchronous streaming but each come with their own points of caution that need to be considered.